Zephyr test cases uplaod

[Kamil]

Hi!

I want to ask you for help with mass upload via api (I'm using 

https://bitbucket.org/zfjdeveloper/zfj-importer/wiki/Home)

I've got a problem with two test upload fields. Assignee and Due Date.

I can upload Test Due Date, which is custom field and I adjust it to date format in import template. Also Reporter field is working- after import I am Reporter.

I tried all combinations of assignee, name.surname, email address etc. the same with Due Date.

Do you have any idea how to import test with Due Date and Assignee ( those are both default fields provided by Zephyr/Jira)?

Thanks in advance!

Kamil